- From: Stasinos Konstantopoulos <konstant@iit.demokritos.gr>
- Date: Wed, 10 Dec 2008 23:32:09 +0200
- To: Eric Prud'hommeaux <eric@w3.org>
- Cc: Phil Archer <phil@philarcher.org>, Bjoern Hoehrmann <derhoermi@gmx.net>, Public POWDER <public-powderwg@w3.org>, Ivan Herman <ivan@w3.org>, Ralph Swick <swick@w3.org>
Eric, hi. On Dec 8, 2008, at 5:30 PM, Eric Prud'hommeaux wrote: > Minor nit: > [[ > We extend RDF with the datatype properties ... > ]] — http://www.w3.org/TR/2008/WD-powder-formal-20081114/#SE > > would imply to me that the RDF machinery must be extended, as opposed > to the application interpreting the RDF graph. Maybe something like: > "POWDER-S uses an <a href="http://www.w3.org/TR/2004/REC-owl-semantics-20040210/syntax.html#owl_DatatypeProperty_syntax > ">OWL DatatypeProperty</a> to relate a resource to a regular > expression which that resource matches. While POWDER-S uses OWL > classes to group resources, any engine determining if a resource > belonged in one of these OWL classes would need to be able to test a > resource against a regular expression." No, not at all, it is the underlying RDF representation where the explicit data lives that is being extended; the inference layer is not affected. Of course inference engines that directly manipulate RDF data need to implement the extension, but in situations where a clean interface exists between the two, the inference engine does not need to know why the wdrs:matchesregex triples are asserted. See also http://lists.w3.org/Archives/Public/public-powderwg/2008Dec/0044.html s
Received on Wednesday, 10 December 2008 21:32:54 UTC